Inner tubes for pneumatic tires.



i uNiTED. s'rrns .ALFRED RAYMOND ANI) ALBERT RAYMOND, OF WASHINGTON, DISTRICT F COLUMBIA;

1T. i N

INNER TUBES PNEUMATIG TIRES.'`

Specification of'Letters Patent. Application led September 25, 1913.' Serial No. 791,8291

To all whom it may concern i Be -it 'known that we, ALFRED RAYMOND and ALBERT RAYMOND, citizensl of the United States, residing at Washington, District of Columbia, have invented and dis- -covered certain new and useful Improvements in Inner Tubes for Pneumatic rI`ires,

of which the following is a specilication.

Qur' said invention consists in certain improvements in the form and arrangement of inner tube structures for pneumatic tires for vehicle wheels of that type comprising multiplechambers or tubes adapted for suc- ,cessive use, whereby whenJone chamber becomes` punctured or disabled, another may `be quickly and `conveniently inflated and 'adapted to take its place in thetire without the trouble, delay andexpense of` removing one tube' and ysubstituting another.

This invention is a"furtheitdevelopment f of the .invention forming the subject matter of oui Patent No. 1,065,836 of June 24, 1913,

and embodies the same advantages set forth forV the particular, structure disclosed in said patent with the additional advantages of more complete and' perfect union of the in'- -dividual tubesconstituting the several chambers, and an arrangement more con- 'venient to make and to use, all as will be hereinafter moie fully described and claimed.

Referring to the accompanying drawings,

I which is made a part hereof, and on which similar reference' characters indicate similar parts, Figure 1' 1s a cross-section through an' inner tube structure for pneumatic tires lei'nbodying our-said invention, Fig. 2 a

similarfview showing one of the side chambers (illustrated as collapsed in Fig. 1) in- Hated, Fig. 3 a detail section on an enlarged scale illustrating the air valve mechanism, F ig. ta perspective view of parts of Y said valve separate, Fig. 5 an underside plan tire inner tube structure and the tubes B .and C which respectively constitute about one third of the interior circumference of the structure, and are united at their inner contiguous edges, as at point y, and are also united for a distance, substantially equal to `ing material 15. :casing 10 is provided with three separate `ports or channels 16, 17, and 18, respec-` lnumerals,

Hner, in successive order, will indicate what their diameters, with the Yinner surface-ofA the tube A. Between the outer edges of the tubes B and C, as at the points .fr and e, the

loutei` tube A( is formed with a thickened portiony a of substantially the thickness of the double walls of said tubes B and- C, and

adjacent to the tread of the tire.

Patented Nov. 1 1, 1913.

The valve struct-ure comprises a casing 'i 10 having'a tubular outer end and a solid inner end with a base plate 11 which is inserted in an aperture through the tube A' and lies between" said tube and the edges of the tubes B and C, being clamped in position by a screw-threaded clamping washer or nut l2. A hollow valve stein 13 is mounted in the casing 10, the lower end of said stem being closed except for a single' perforation 14 and its outer surface is provided with a disk of rubber orother pack- The, solid lower end of tively, port 16 leading directly into the chamber' within tube A, `port 17 leading to one side and connected to discharge within tube B, and port 18 leading to the other side' and connected to discharge within tubeV C, as clearly illustrated in Fig. 3.

The upper end of casing l0 is provided with three slots; 19, 20, and 21, and the tubular stem 13 is and an indicator mai-k, as an arrow 23, point-ing therefrom. 1When said steni is 4turned so that the lug 22 registers with slot 19 the aperture 14 will register withV the appropriate one of the ports 16, 17, or 1S. Vhen the lug registers with slot 20, communication will be established with another port, and when it registers with slot 21 communication will be established .through the other port. In this manner either tube A, B, or C may be inflated at the will of the user and by intlating them in successive order the position of the lug 22 in relation to the several slots which are indicated by or in any other appropriate inantubes have been used and which tube should b`e used next. Y

yIn use the inner tube structure is arranged first as shown in Fig. l1 and the fair is pumped into tube A which inlates said tube provided with a lug 22 icc and flattens the tubes B and C against the interior surface of said tube A. In Fig. 1 these tubes are shown with their walls slightly separated, but it will be understood that when collapsed, as from to y and from y to z, respectively, is fused with said tube A by a process forming the subject matter of our a plication No. 791,830 filed herewith. The t ickened portion a of the tube A affords to the tread of the tire the additional thickness and resisting qualities required. When tube A is flattened, or otherwise disabled, the valve 13 is adjusted to direct the air to the tube B, which is then inflated, and after tube B isv disabled then the air is likewise directed into the tube C, which is then inflated, the tubes B and C when infiated assuming a position, respectively, such as illustrated in Fig. 2. By an eX- amination of said figure it will be noted that the strain of expansion consequent upon the inflation of either of said tubes B or C will be directed around the circumference of the respective tubes and'draws smoothlyv upon all parts of the walls thereof, and that the walls of the collapsed tub-e are held straight and 'smooth underneath the expanded tube, thus avoiding any bunches or Wrinkles therein which would materially impair the resiliency of the material, if allowed to remain therein for any considerable continuous period.

By this structure a tire is provided, as in our forinerpatent above referred to.xghei:ein

three chambers are available for successive use and t-he ordinary life of the tire thus. trebled.

It will also be noted that in our :prsent structure, as well as in that of our former patent, the individual tubes, ,-orfchambers, are arranged in the order et-'a triangle, whereby it is rendered impossible by a punc# ture extending entirely through the tire to the rim of tire wheel to penetrate the walls of all of saidtubes'or chambers.

Having thus fully described our said invention, what we claim as' new and desire :f

to secure by Letters Patent is:l

1. An inner tube for pneumatic tires comt prising a series of air chambers,some of ving tube for a which are contained Within the wall sur-l rounding the other chamber, the inner cham-y bers being complete tubes secured to the inner wall of the outer chamber for substantially one half of their circumferences, andan air supply means adapted to diefv charge into each of said chambers successively, substantially as set forth.

2. A multiple chamber inner ture for pneumatic tires comprising a series of tubes adapted for successive use, one tube surrounding the other tubes, and the' inner tubes secured to the walls'of the surrounddistance approximately equal to their respective diameters, substantially las set forth.

3. A multiple chamber inner tube structure for pneumatic tires comprising a series tube struc-,

SQL

of tubes one o-f which surroundsthe others, v

the inner tubes being secured edge to edge and with that portion of their faces adjacent to the outer tube secured to the inner face'thereof, said outer tube being formed with a thickened portion in the space betweenthe edges of the inner tubes adjacent to the tread of the tire, substantially as set forth.

4c. An inner tube structure for pneumatic tires comprising a series of tubes one of which surrounds the others, said outside tube having a thickened portion and its inner walls having a series of tubes attached thereto: edge to edge between the edges of said `thickened portion, and means for infia-ting sajid tubes successively; substantially as set frth.

5; An inner tube structure for pneumatic tires comprising a. series of tubes contained within a surrounding tube and attached to the inner wall of said surrounding tube, said surrounding tube being provided with thickened portions between the adjacent edges of said inner tubes, and means for ini flat-ing said several tubes successively, sube v'stantialiy yas set forth.

In witness whereof, we have hereunto set your hands and seals at Akron, 'Ohio this 24th day of September, A. D., nineteen vhundred and thirteen.

Witnesses:

'HELLEN L. Gabin',

CARRIE D. Kisnorrr.

Copies ofth'is patent may be obtained for ve centsfeaeh, by addressing the Commissioner of Patents, Washington, D. C. 

